Patent Assignment
Reel/Frame 020312/0907
Merger
Recorded: 2007-12-31
Pages: 8
Assignor
CELANESE VENTURES GMBH
Executed: 2006-07-05
Assignee
CELANESE HOLDING GMBH
FRANKFURTER STRASSE 111, KRONBERG IM TAUNUS, 61476, GERMANY
Covered Properties
(4)
Proton-Conducting Polymer Membrane Comprising a Polymer with Sulphonic Acid Groups and Use Thereof in Fuel Cells
Polymer Film Based on Polyazoles, and Uses Thereof
Proton-Conducting Polymer Membrane Comprising Sulfonic Acid-Containing Polyazoles, and Use Thereof in Fuel Cells
Proton Conducting Polymer Membrane Comprising Phosphonic Acid Groups Containing Polyazoles and the Use Thereof in Fuel Cells
Related Assignments
(5)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Mar 23, 2005
From: KIEFER, JOACHIM; UENSAL, OEMER; CALUNDANN, GORDON
To: CELANESE VENTURES GMBH
Reel/Frame 015954/0608 →
Assignment of Assignor's Interest
May 24, 2005
From: KIEFER, JOACHIM; CALUNDANN, GORDON; UENSAL, OEMER; BAURMEISTER, JOCHEN
To: CELANESE VENTURES GMBH
Reel/Frame 016272/0984 →
Assignment of Assignor's Interest
Aug 24, 2005
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 016909/0506 →
Assignment of Assignor's Interest
Apr 12, 2006
From: UENSAL, OEMER; KIEFER, JOACHIM; CALUNDANN, GORDON; SANSONE, MICHAEL
To: CELANESE VENTURES GMBH
Reel/Frame 017471/0485 →
Assignment of Assignor's Interest
Feb 11, 2008
From: CELANESE HOLDING GMBH
To: BASF FUEL CELL GMBH
Reel/Frame 020491/0582 →